Drop-press.



S. H. DYER.

DROP PRESS.

APPLIOATION FILED SEPT. 23, 1912.

Patented Dec. 30, 1913. I

7 Fl EL 3.

Z INN/ENTER;

a; fir A fi wz iii r N F E E5. :i-QZA 174/ W 1 UNITED STATES PATENT OFFICE SILAS H. DYER, OF NORTH ATTLIdBORO, .MASSACHUSETTS, ASSIGNOR, TO Gr. LANZA DAVISON', 0F \K INTHROP, MASSACHUSETTS neon-PRESS.

Specification of Letters latent.

Application filed September 23, 1812. Serial $0,721,817.

To all whom'z't may concern:

' ,Be it known that I, SILAsH. Dyan, a

improved means for eflecting the dropmovement of the hammer independently of the lifting'mechanisln, and for taking up the rebound of the hammer, as hereinafter set forth.

In the accompanying drawing: Figure 1 represents the front view of the lower portion of a drop press. Fig. 2 represents a verticalsection of a portion of the same taken in the line 2,2, of-Fig. 1. Fig. 3,

represents a horizontal section-taken in the line 3,3, of Fig. 1. Figs. 4 and 5 are detail sections of the take-up device.

. In the drawings, A represents the slides of the press, B thehammer, G the die upon which the hammer strikes, and D the lifting catch'by means of which the hammer is raised to its desired elevation, the said lifting catch being pivotally held inthe carrier D the strap E, and the catch is actuated into engagement with the notch E at the back of the hammer B, by means-of the spring The mechanism for causing the disengagement of the catch from the said notch F, consists in the sliding pin H, which is loosely held in the hole I made through the" hammer, and which projects outwardly at the side- 7' of the {said hammer, and enters 'a recess is made in the face of the-cam-bar' L which is pivoted at m, to the face of the hammer, and. held against the stop-n by Upon the upward movement of the, hammer, the cam-bar L comes in contact with the adjustable stop P, and then its ,urther movement with the hammer ceases, whereupon the resulting backward movement of the slidin ment of the catchD out of the notch F to release the hammer, and cause it to drop;

the position from which it is released to drop, being governed by the position of the adjustable stop P, upon the slide -of the press.

When the hammer falls from an elevated position, it is liable to rebound and in order to catch the hammer as it rebounds and hold it away from the work, I

plate Q having a notch R, which plate is at tached to the face of the hammer, as shown in Figs. 4 and 5, and upon the side oi the slide A of the press,, is, pivoted the camlever S at the point T, the said cam lever S,

placed the pawl U, which is actuated in the forward direction by means of the spring which is operated by means of end of the cam-lever forward as shown 1n Fig. 4, by the engagea pin H,- out of the recess is, will cause the. dlsengageposition at the face of the slide A, by means of friction. Now when the'hammer B is raised from its lower position, the end of the cam-bar L comes in contact :with the the hammer. whereupon, it will be caused to drop to the die C. and iii-its descent the hammer will strike the inwardly. projecting to move backward to Fig. 5, and upon the upward rebound of the hammer it will be its elevated position above the die, by means upward. movement of the-hammer, the lower S will be again brought ment of the upper corner ofthe hammer, with the inwardly projecting upper end' of the cam-lever.

I claim as my invention:

1. In a drop press, the combination of the hammer, the lifting catch for the hammer, the carrier to which the catch is pivoted, means for operating the carrier, the sliding pin passing through the hammenthe pivoted cam-lever for the stop for the 'cam-lever.

SILAS DYEia.

the hammer.

Witnesses Soom'ms SCHOLFIELD,

BE JA IN L. DENNISJ V, and limited in its forward movement bymeans of the shoulderp of the said cam, lever, which cam-lever is retained in its set adjustable stop P, and causes the release of.

lower end of'the cam-lever S and cause it I the position shown in I caught and held in operating the pin and;

2.-In a-drop press, the combination of a hammer provided with a notched plate, the. ca -lev er and pawl pivoted to the Slldbfr 100 I plate an'd'means for raising'and releasing Patented Dec. so, ass a.

provide a I bemg provided with a recess, in which is of the pawl U, and thereafter, uponthe- 

